Hi Daniel

Thanks for your input.  Yes, I’ve had the problem of partitions ending up the 
wrong size down the track.

I wanted a “temporary” backup storage area as several “spare” external drives 
have data relating to the 2009 iMac in its various stages of decline and 
recovery.  I don’t want to delete them yet.
  
I decided on the sparse image approach because SuperDuper erases the target 
disk as part of its process - and I didn’t want that going on near the boot 
drive. I decided that I could put several images in the one partition, which 
could be moved one at a time if space became an issue.

However, I am now thinking that my security needs (fumble fingers, not web 
probes!) could be improved by putting the sparse images in the standard 
structure of a second (bold, italic and underline!) user account.  The images 
only need accessing once a month in normal times.  May keep them there, and not 
worry about external drives at all …

Cheers
Alan


On 14 Dec 2014, at 7:22 pm, Daniel Kerr <[email protected]> wrote:

> You can create one partition on a Fusion drive, after that ,…no.
> More info here. - http://support.apple.com/en-au/HT202574
> My personal opinion on partitions on internal drives,…and again I point 
> out,..this is my personal opinion, I think partitions are a waste of time.
> You're not gaining any benefit with a partition, and nine times out of ten, 
> down the track either Part A or Part B of the partition is the "wrong size". 
> Then you have to go back to square one.
> Generally just easier to a) get another external drive as a backup (as 
> externals are cheap), as you'll spend less "money time" on it and can get 
> larger sizes,…or just create a backup folder to back up to.
> There's no real "benefit" in partitioning I find…not these days. It's not 
> like if one partition dies it's not going to affect the other partition, as 
> it's the same drive…….
> 
> Again, just my take on it,…..
> 
> Kind regards
> Daniel
> 
> Sent from my iPhone 6
> 
> ---
> Daniel Kerr
> MacWizardry
> 
> Phone: 0414 795 960
> Email: <daniel AT macwizardry.com.au>
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> 
> 
> **For everything Apple**
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> NOTE: Any information provided in this email may be my personal opinion and 
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> On 13/12/2014, at 1:04 PM, Alan Smith <[email protected]> wrote:
> 
>> I would like to utilise some of the vast unused space on the internal drives 
>> of two iMacs as backups for films.    Is this possible?   If it is possible 
>> then what is the downside?   Could such a partition be later removed to 
>> restore the space to OS X?   I do not want to go through the disk-erase and 
>> OS X re-install operation!
>> 
>> My concept is to use SuperDuper to create a sparse image (which permits 
>> smart updates) of some of the films on a USB 3 external drive.     In 
>> practice I would use say three sparse images for ease of management.
>> 
>> iMac 1 (2012) has 1TB with Fusion Drive.  iMac 2 (2009) has a standard 1TB 
>> drive.  I would prefer to use the Fusion Drive iMac for the backups.  Both 
>> iMacs have Mavericks installed, and hence should also have Recovery 
>> partitions.   (If an OS X upgrade or Boot Camp can install partitions, why 
>> not me??)
>> 
>> I have assumed a partition would be needed, but can a sparse image simply be 
>> used as a file within the ‘Macintosh HD’ OS X startup volume structure?
>> 
>> 
>> Regards, 
>> Alan
>> 
>> Alan Smith
>> Late 2012 iMac 27" Intel Quad Core i5  Fusion 3.2GHz 8G RAM - OSX 10.9.5 
>> Mavericks
>> Late 2009 iMac 21.5" Intel Core 2 Duo 3.06GHz 12G RAM - OSX 10.9.5 Mavericks
>> iPhone5;  iPad2;  ATV2
>> 
>> 
>> 
>> 
>> 
>> 
>> 
>> 
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